Mandevilla thrives in warm, humid climates with plenty of bright sunlight. It grows best in well-draining, nutrient-rich soil with a slightly acidic pH. The plant prefers temperatures between 65°F and 85°F (18°C29°C) and should be protected from frost. Water regularly to keep the soil evenly moist without becoming waterlogged. Good air circulation and a sturdy support structure encourage healthy vines and abundant flowering throughout the growing season.